Bearing for casting-machines.



vornimmt sENs'AUn DE LAVAUD, on NEW Yorin, N. Y.

BEARING FOR CASTIxG-MCHINES.

Specification I Letters yate-nt.

Patented May 6, 1919.

Application mea onweer t, 1917. serial Ne. 194.97%'.

iron pipe, which machines include a rotary mold and a journaling'. mounting,r therefor.

The prime obiect ot' the invention lsto provide a ball-bearing tor the mold which will permitthe mold to be rotated with the requisite absence ot' friction at all times,

irrespective ofvuryingir temperatures ot' the mold, and consequently of varying ohmenv sions fthcreot', relative to the journaling mounting andthe parts fixed to the same. It is well known that the temperatures of i the mold are 'very great during operation of not. the mold is watcncooled.

the machine; sometimes reaching 3000o Fahrenheit and over.

Where' the journalingmounting has itself been fixed'. such mountingr has soinetiniics ornied a part ot or been associated with a t shell surroundintr but spaced from the mold,

to provide a cooling` chamber between the mold and-the shell, through which water or otherco'oling liquid may be circulated dur ing operation ot' the machine. Another ob ject. of the invention aemudingly, .s to provide a ballfbearing' adapted to be subjected to the cooling'infiucnce of the circulating liquid for the mold cooling-r chamber; although it will be understood ofcourse that the invention also contemplates the A provision of a lulll-beariugl adapted to be water cooled, it water-cooled at all, bylany water circulation and irrespective off) lrethcr or A further object is to provide a ball-bearing construction in which the balls work in oil wells or baths; and in such a wav. it desired, that when the ball-bearingr is watercooled as above. the water or other cooling liquid vand the oil will not mix but cach will be confined to its own appointed chan'iber.

In cz'irryinpa out the invention, a structure is preferably provided comprisingA innerand outcr ball races arranged overlappingly and hollowed out beyond the ball contacting sui'- faccs lo provide oil sides of the line oi balls. the races havingball contacting surfaces portions of which surfaces portion relative to said balls. v meting surfaces of Fig'. chambers at opposite are straight and parallel to each other and to the axis; of the machine to permit thev balls' to roll axially of the machine relatg to their races or to permit oneof the ray yto move relative to the other race axially of the machnfe;

The invention will be more clearly understood 'from an examination of the accompanying drawing, Awhen `taken in connectionv` with the following description of two possi? ble embodiments of theilf'vimtion. IIn the drawing, Figures 1 and 2 are similar in that each shows only the upper half of an end portion of the mold'.

n both these ligures, 3 represents the mold and fi a pipe cast therein.I Illhe Vparts rotating with the mold 3 include a ball race B and an end plate this end plate being bolted to the mold 3 asi-ihdicaited at 6 and to the race B as indicated at y The other bal] race B is mounted on ans 'nular member 8 by means -of bolts as indicated at 9. The member 8, in the/present inst-ance, is lixed relative to the mold 3, and said member has secured therein, in 'soine suitable way 'not shown, a whereby adjacent to the ballbearing two aunuIarchambers 10 and 10 are provided for having passed therethrough fluid for coolingr the mold and other parts of the ruacliine likely to become too hot.' The cooling fluid` water, .is admitted, by means of a suitable conduit not shown, to chamber 10, thence entering chamber 10 by .Way'of pasp. (See United States Patent No. 1,276,038 issued to me.) i The balls are indicated at L. 4 Referring particularly to Fig. l, race BF' provided Vith a straight ball contacting surface Z), and race B is provided with a similar surface b; the two surfaces being"r substantially'parallel to the axis A-`X of the machine and consequentlyv substantiallv parallel .to each other. Ag viewed in 'F l, the right end ot the surface ,of race B `merges into a curved surface S constitutingr a stop-portion relative to the balls Lafand Lthe lett ond ofsurface Z1 of race B merges into a curved surface S constituting a stop The ball-conare similarlv conthe balls L may roll formed. Thus, While .axially of the machine, the stop-portimis a predeterunnately and and a" limit the balls partition 8",

restrain them at a point short of thepoint where, they would leave the races B and B.

lt will be noted, especially when the por'- tion 8 ot' the member S'is considered a part ot' the race B', as in effect it actually is, that each race B and By is substantially U-shaped in cross-section the races being hollowed out, at /l and J/,beyond' the ball contacting sur faces, to provide oil chambers or .wells at opposite sides of the balls.

l have found that the relatively movable circumferential surfaces on the ball races and on the other )arts of the machine may in practice be so c osely spaced as to provide passages p and p to prevent seepage from the oil in the chambers h and L. Thus oil does not leave these chambers, either to the exterior of the machine, by way of the passage p, orl to the water chamber 10, by wayof the passage p. At the .same time, no water from the chamber 10 passes in the reverse'direction through the passage to mix with the oil in the chambers h and t'. I have also found, however, that'separating gaskets may conveniently be employed, and such a construction is shown in Fig. 2 and believed to be preferable. llere the passage p is enlarged at pa for the reception of separating gaskets 1l and a rasket clamping and compressing ring lf2, Ahis ringlbeing adjusted by screws or the like, one of which is shown at 13. I

l claim; y

`1. ln a centrifugal casting machine, the combination with a rotary mold and a journaling nwmber therefor of a ball bearing for the mold comprising an inner race, an outer race, and a plurality of balls between the two races, the second `race being secured to the mold and the lirst race to said member and the two races having substantially parallel straight lsurfaces substantially parallel to the length of 4the machine.

ln a 'centrifugal casting, machine, the comhinathm with a rotary mold and a member upon which the mold is mounted for rotation relative thereto, of a ball bearing for the mold comprising an inner race, anouter race. and a plurality of balls between the two races, the second race being secured to the mold and the first race to said nien'lher, and the two races having oppositely but rcverscl y arranggged ball retaining surfaces, 'each of c such surfaces being delincd by a curved line and a straight line-'in prolongation of the curved line.

il. ln a centrifugal casting machine, the combination with a rotary mold and a member upon which the mold is mounted for ro-l tation rel'atiive thereto, of a ball bearing for the mold comprising an inner race, an outer race, and a plurality of 'balls' between the two races, the second race being securedto the mold and the first race tolsaid' member,

and the two races having` onpositely but re- Vcrsely arranged bail retaining surfaces, each of the surfaces bein f partially straight to permit the balls to rol parallelly to the molds axis between the two races.

4. In a centrifugal casting machine, the coi'nbination with a rotary mold and a member-upon which the mold is mounted for rotation relative thereto, ot' a ball bearing for the mold comprising an inner race, an outer racc, and' a plurality ol balls between the two races, the second race being secured toV the mold and vthe first race to said member and the two races having straight surfaces substantially parallel to the axisy of thd`mold to permit the balls to roll parallel to said axis during rotation of the mold, the races carrying stop-portions to limit the rolling action of the balls short of the point where the balls wouldlearc the races.

5. In a centrifugal castingv machine, the combination with a rotary mold, of a ball bearing for the mold comprising an inner race, an outer race, and a plurality of balls between the two races, the second race being secured to the mold and the races being formed with opposed ball contacting surfaces whereby the.balls`may roll axially lof the machine relative to either racc.

G. ln' a centrifugal casting machine, the combination with a rotary mold, of a ball bearing for the mold comprising an inner race, an outer race, and a plurality of balls' between the two races, the second race being secured to the mold and the being formed with substantially parallel ball con-- tact-ing surfaces to permit one of the races to move axially of the machine relative to the other race.

7. In a centrifugal casting machine, the combination with a rotary mold, of a ball bearing for the mold comprising an inner race, an outer race, and a plurality of balls between the two races, the races being Formed with opposed hdl contacting surces whereby'tl'ie balls` may roll axially of the machine and thereby permit onel ofy the races to move axially of the machine relative to the other race, each race being. substantiall y Usshaped in crosssection toprovide a lpair of annular oil wells at opposite sdesiof the`line ol" balls.

8. Ina centrifugal casting machine, the combination with a rotary mold, of a ball bearing for the mold comprising an inner race, an outer4 raci, and a plurality ol balls between the two races, the races beiugformed with opposediball contacting surfaces whereby the balls may rolll axially of the machine. and thereby permit lone of the races to move axially of' the machine relative to the other race, one of the races being suhstanti ally U- shaped in cross-section to provide an aimuv lar oil well at one side of the line ol' balls.

5). In a centrifugalA casting machine` the 'combination with a rotary mold, of a ball rse aaneen race, an outer race. and plurality of balls balls botar I formed auf ai between the two rares, the races being formed with. opposed ball contacting surfaeeswhere by the ballsy iuay roll axially of the machine and thereby permit one of the races to move axially ot the machine relative to the other race, the races being overlappingly arranged and. hollowed out beyond their ball contacting surfaces toprovidc oil-chambers at opposite sides of the balls. v

A10. In a centrifugal casting inachii'iethe *Con'ibination with a rotary mold, of a ball bearing for the mold comprising an inner race, an outerrace, and a plurality of balls between the two races, the races being formed with opposed ball contacting surfaces whereby the balls may roll axially of the machine and thereby permit one of the races to move axially olE the 'machine relative to the other race, the racen being overlappingly arranged and one being hallowed out beyond its 'ball contat/tuig .surface to provide an oil chamber at one eide of the balls.

ll. ln a'centriugal casting machine, the combination with a rotary mold and a memberrelative to which.2 the mold rotates,.ofy a ball bearing for the mold comprising an inner race, an. outer `race, and a plurality of balls between the two races, the races being formed with opposed ball contacting sur fat-ea 'whereby ft-hf balle may roll axially oi thel .hitachi the notary mold and said inem-- ber being i i and arranged to provide a water cooling eliamber adjacent to the "ball bearing, and one of the ball lraces `being formed and arranged to eonstitute one of the walls of aad chamber thereby to permit the ball bearing to be water cooled. y

le. a centrhagal casting machine, the combination"with a rotary mold and a inember relative to which the mold rotates,.of a ball bearing ner racen-in outer race7 and a plurality of en the two races, the races being with opposed hall contacting surformed faces 'whereby the balla` .may roll axially of the inarhiini, the rotary xnold and saidmembenbi formed. and arranged to provide t coolir chamber adjacent to the ball bearing, and ,i oi the ball races being aged to constitute one of the walls: oi' sanil `chanziber thereby to permit the ball'bearing to be Water cooled. one of "the races being hollowed out beyond itsballcontanting*` surface to provide ber at one eide oit the balls.

"1.3. )in a centrifugal casting machine1 the rombinatioa withza rotary mold and a member relative to wllirh the for the mold comprising an in the machine, the rotary moldand said menibcr being formed and arranged to provide a water cooling chamber adjacent to the ball bearing, and one loi" the ball races being formed and arranged to constitute one of the walls of said chamber thereby to permit theball bearing to be water cooled, the last mentioned racc being hollowed out adjacent to Said wall to provide an oil chamber.

14. In a centrifugal casting machine, the combination with a rotary mold and a'member upon which the moldis mounted forrotation, of a ball bearing for the mold couiprising an inner race, an outer race, a plurality of balls between the two races, and a fixed annular member, the races being formed with opposed ball contacting surfaces whereby one of the races may move axially of the machine relative to the other race, ,the races being overlappingly. arranged and hollowed out beyond their ball contacting surfaces to fprovide oil-chambers atoppositesides of the balls, the rotary mold and said fixed annular member being formed and arranged to proan oil-charnmold rotates, of a ball bearing ilor the mold) cou'iprising: an in-l ner race, au, outer?" race, and a plurality of Y halls, between the two races, the races being torinorl with opposwl ball ',contactlng surfarea whereby the balls may roll axially of vide a water-cooling 'chamber therebetween adjacent to Athe ball bearing, and the parts being also so formed and arranged that annular passages are provided, of toov small thicknessfor. the seepage therethrough of oil, between the oil and water chambers.

l5. vIn a `centrifugal casting machine, the combination with a'rotary mold and a member upon which the mold is mounted for rotation, of a ball bearing for the mold 'comprising an innerrace,

the races being secured one, to the mold and the other to said member and being formed with opposed ball contacting surfaces whereby one of tlleraoes 105' cured to the mold from completely closing 120l l said passageon expansion due to expansion of the mold..

16. In a'centrifugal casting machine 'the ombination with a rotary mold and a menii er tation, of a ball bearing `for the mold comprising an inner race, an outer race, and a plurality of balls between the two races the races being formed with opposed bal Acontacting surfaces. .whereby one of passage is pro- 115 upon which-the mold is mounted. for ro` 125 an. outer race, a pluy v rahty of balls between the two races, and a fixed annular member,

the rotary mold 110@ the" races 1805 may move axially of the n'iachinertlative to the other race, the parts being shaped and arranged to provide an oil-chamber for the balls and to provide an annular passage surrounding one of the races; the parts also beying so formed and arranged that an annular chamber is formed intermediate the ends-ot thetpassage. and there being provided an annular packing in said chamber.

IT. In :t centrifugal casting machine the combination with a rotar'v mold and a memher upon which the mold mounted for rotation, of a'hall bearing for the mold comprising an inner race, an outer race, and a plurality oi' halls between the two races, the races being formed with opposed ball contacting surfaces hereby one of the races gnay move axially ol' the machine relative to the other race, the parts being shaped and arranged to provide an oll-chan'iber for the halls and to provide an annular passage surrounding one of the races; the parts also bevanti-friction rolling members between the two races, the two races being so formed and arranged and respectively connected to the said two bodies-that on an expansion of the rotary body due to a temperature higher than that of the journaling body the race connected to the. rotary member expands to move away from the other race.

lf). In an apparatus including rotary and journaling bodies ywherein the journaling body sleeves the rotary body and wherein the rotary body is adapted to have greatly higher temperatures than the journaling body, an anti-friction'bearing for the rotary .body comprising a first race, a second race between the lirst race and the rotary body, and a series of anti-friction rolling members between 'the races` the first race being secured to the rotary body.

20. In an apparatus including rotary and journalingr` bodies wherein the 'journaling bodyslmn'es" the rotary body and wherein the rotaryv body is adapted to have greatly higher temperatures` than the journaling body; an ant friction hearing for the rotary .'bod'y*comprising k'a `first race, 'a second race between the first race and the rotary body andif ,i'i'es nii/anti-i'riction rolling members between tle races. the second race being se- 1curedto'the jourmlling body and the first race being disposed between the second race and the journaling body.`

2l.A In a centrifugal casting machine, the coml'iination with a rotary-mold inner structure and an outer structure fixed relatively to the inner structure, of an inner race for an anti-friction bearing, and an outer race for said bearing, the inner race being secured to the outer structure and the outer race being secured to the inner structure. A

2:2. In an apparatus including rotary and journaling bodies wherein the rotary body is adapted to have greatly higher temperatures than the journaling body, an anti-friction bearing for the rotary body coniprising an inner race, an outer race, and a plurality of anti-friction rolling members between the races, the races being so conformed and arranged as to provide between them an annular chamber of substantially S-shaped crosssection for housing the balls.

23. In an apparatus including rotary and journaling bodies wherein the rotary body is adapted to have greatly higher temperatures than the journaling body, an -anti friction bearing for the rotary body comprising an inner race and an outer race having sleeve parts which overlap, each race having a rib part connected to its sleeve part beyond the zone ot' overlap, 'with the rib-part of each race extending laterally of the machine beyond the lsleeve part of the other race and the two rih parts connected respectively to the rotary and journaling bodies.

In an apparatus including rotary and journaling bodies wherein the rotary body is adapted to have greatly higher temperatures than the journaling body, an antrfric4 tion hearing for the rotary body comprising inner and outer ball guiding sleeves, and an annular wall secured to the outer sleeveand fixed on the rotary body.l i

In a centrifugal casting machine the combination with a rotary mold anda journaling support. therefor, of an anti-friction bearing interposed between the mold and support and including two annular structures offset respectively from the mold and the support and substantially L-shaped in cross-section with Yparts overlapping laterally of the machine.

26. In a centrifugal casting machine, in combination, a rotary mold carrying an annular pocket having an outer substantially cylindrical Wall, and a ljournal-support for the mold having a sleeve-like part for insertion in said pocket, the inner surface of the pockets cylindrical wall and the outer surface of the sleeve-like part being conformed to provide opposed co-acting guiding surfaces for a plurality of anti-'friction roller members. j

27. In a centrifugal casting machine, in combination, a rotary mold carrying a casting machine, which consists in providing a single Water circulation and confining and guiding said circulation to cause the circulatmg Water first to pass in contact with the mold to reduce the temperature thereof and thereafter in contact with the bearing to reduce the temperature thereof.

29. The process of cooling an anti-friction bearing for the rotary mold of a centrifugal casting machine, said bearing including mner and outer races one secured to the mold, which consists in providing a single water circulation and confining and guiding said y circulation to cause the circulating water to pass in contact with the mold to reduce the temperature thereof and thereafter in contact with the race of the bea-ring secured to the mold to cool said bearing.

30. The process of cooling an apti-fricti on bearing for the rotarv moldv of a centrifugal casting machine, sai bearing including innel: and outer races one secured to the mold, which consists in providing a single water circulation and confining and guiding said circulation to cause the circulating water first to pass in -contaetwitli the mold to-reduce the temperature thereof and thereafter in contact with the bearing to reduce the temperature thereof, while reducing the cross-sectional area of the flow as the water circulates in Contact with the bearing to increase the refrigerationeffect of the water heated from previous contact withthe mold.

31. In a centrifugal casting machine, the

combination with the rotary mold, of an anti-` anti-friction bearing therefor includimgr a race-ring having a wall substantially parallel to the mold and a wall angularly disposed relative to the first wall, a j acketing member providing a chamber for a cooling circula-- tion for the mold, and ajacketing member providing a chamber for a cooling circulation for said race-ring, the parts being so formed and arranged as to provide a communication passage'between the two cham-v bers, the cross-sectional area of the Vpassage being less than the cross-sectional area of either of the two chambers.

' 33. In a centrifugal casting machine, the combination with the rotary mold, of an anti-friction bearing therefor including a race-ring having a wall substantially parallel to the mold and a wall angularly disposed relative tothe rst wall, a jacketing member providingia chamber for a cooling ciroula- 32. In a centrifugal casting machine, the `rcombination wlth the rotary mold, of an tion for the mold, and a jacketing` member providing a chambr'for @cooling circulation for said race-ring, the parts being so formed and arranged -as to provlde a communication passage between the two chambers, the cross-sectional area of the passage being less than the cross-sectional area of the chamber provided by the jacketing member for the mold.

In testimony whereof I have signed my name to this specification.

DIMITRI SENSUD DE LAVUD. 

